Mplab C30 Compiler Direct

// Initialize (buffer must be 2^N, ideally in Y data space) void c30_cbuf_init(c30_cbuf_t *cb, unsigned char *buf, unsigned int size) cb->head = 0; cb->tail = 0; cb->mask = size - 1; cb->buffer = buf; cb->len = size;

// Interrupt-safe get inline int c30_cbuf_get(c30_cbuf_t *cb, unsigned char *data) if (cb->head == cb->tail) return -1; // empty mplab c30 compiler

*data = cb->buffer[cb->tail]; cb->tail = (cb->tail + 1) & cb->mask; return 0; // Initialize (buffer must be 2^N, ideally in

// ------------------------------------------------------------ // 3. ISR MACRO (fixes C30's verbose/error-prone vector syntax) // ------------------------------------------------------------ #define INTERRUPT(vector, priority) void ((interrupt, auto_psv)) _ ## vector (void) // Initialize (buffer must be 2^N

cb->buffer[cb->head] = data; cb->head = next_head; return 0;

A for C30 would address its most common real-world pain points: poor RAM banking management , lack of built-in circular buffer support for DSP , and verbose ISR syntax .

int main() init_uart_buffer(); unsigned char ch; while (1) if (c30_cbuf_get(&uart_rx, &ch) == 0) // process byte